High quantitative hepatitis B surface antigen is usually found in patients with hepatitis B. Because hepatitis B surface antigen belongs to the substance that replicates the most after hepatitis B virus infection, the small particles composed of hepatitis B surface antigen are the most numerous in the blood circulation. If the test is a quantitative hepatitis B five, hepatitis B surface antigen is the first item, most likely a positive result, that is, a high quantitative. If the surface antigen quantification of hepatitis B is only slightly elevated and not particularly significant, and the other items in the five quantitative items of hepatitis B are negative, it may be a testing error and can be tested again after a period of time. If the quantification of hepatitis B surface antigen drops to the negative range, there is generally nothing to worry about. However, if the hepatitis B surface antigen quantification is very high without any significant change over time, it is basically clear that the state of hepatitis B virus infection is present.